Canon EOS Rebel XSi 2x Teleconverter (4 Elements) + Nwv Direct Microfiber Cleaning Cloth. Doubles Focal Length of Lenses (4-Elements) Multi-Coated Optical Glass with Anti-Reflection Coating NOTE: Not compatible with Canon EF-S Lenses - Only EF Lenses) ** For The Same Extender which is applicable for the EF & EF-S Lenses - SEE ASIN: B07HSV8DX8 ** Manufacturers' Lifetime Warranty Item Includes: Case, Protective Lens Cap, Nw Direct Micro Fiber Cleaning Cloth